Contacted by recruiters through linkedin, the process took less than a week, and then had an initial phone interview followed by another phone screen. After 2 days the recruiter got back to me providing a negative response. Nothing was serious, the questions are straightforward there is no tricks or any difficult problems, it's just if you did anything wrong and didn't correct it and even if you correct it; it could be a red flag to them, also the speed is very important. The recruiter didn't have much details to share with me and he told me that there is nothing serious, but, this is how it works, for me; I didn't know the criteria they judged about.